package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;


@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private RedisTemplate redisTemplate;
    @Autowired
    private DishMapper dishMapper;

    @Autowired
    private DishFlavorMapper dishFlavorMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;


    /**
     * 新增菜品和口味信息
     * @param dishDTO
     */
    @Transactional
    public void saveWithFlavor(DishDTO dishDTO) {

        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        //1，插入菜品信息
        dishMapper.insert(dish);

        Long dishId = dish.getId();

        List<DishFlavor> flavors = dishDTO.getFlavors();
        if(flavors!=null &&flavors.size()>0){

            flavors.forEach(dishFlavor ->{
                dishFlavor.setDishId(dishId);
                    }
                    );
            //2，插入口味信息
            dishFlavorMapper.insertBatch(flavors);




        }


    }

    /**
     * 菜品分页查询
     * @param dishPageQueryDTO
     * @return
     */
    public PageResult pageQuery(DishPageQueryDTO dishPageQueryDTO) {
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        Page<DishVO> page=dishMapper.pageQuery(dishPageQueryDTO);


        return  new PageResult(page.getTotal(),page.getResult());


    }

    /**
     * 菜品批量删除
     * @param ids
     */
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断菜品是否在起售中，如果在则不能删除
        for (Long id : ids) {
            Dish dish=dishMapper.getById(id);
            if(dish.getStatus()==1){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }

        }
        //查看菜品是否被套餐关联，如果关联则不能删除
        List<Long> setmealIds=setmealDishMapper.getSetmealIdsByDishIds(ids);
        if(setmealIds!=null&&setmealIds.size()>0){
            throw new DeletionNotAllowedException(MessageConstant.DISH_BE_RELATED_BY_SETMEAL);
        }
        // 删除菜品表中的数据
        for (Long id : ids) {
            dishMapper.deletById(id);
            //删除口味表中的数据
            dishFlavorMapper.deletByDishId(id);

        }






    }

    /**
     * 根据id查询菜品和口味信息
     * @param id
     * @return
     */
    @Override
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品信息
        Dish dish = dishMapper.getById(id);
        //根据id查询口味信息

       List<DishFlavor> dishFlavors= dishFlavorMapper.getByDishId(id);

        //组装DTO返回
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish,dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;





    }

    /**
     * 修改菜品信息
     * @param dishDTO
     */
    @Override
    public void updateWithFlavor(DishDTO dishDTO) {

        //根据id修改菜品信息
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO,dish);
        dishMapper.update(dish);

        //根据id先删除口味信息

        dishFlavorMapper.deletByDishId(dishDTO.getId());


        //之后在插入口味信息
        List<DishFlavor> flavors = dishDTO.getFlavors();

        if(flavors!=null &&flavors.size()>0){

            flavors.forEach(dishFlavor ->{
                        dishFlavor.setDishId(dishDTO.getId());
                    }
            );
            //2，插入口味信息
            dishFlavorMapper.insertBatch(flavors);
        }



    }

    /**
     * 根据分类id查询菜品信息
     * @param categoryId
     * @return
     */
    @Override
    public List<Dish> getByCategoryId(Long categoryId) {
        Dish dish = Dish.builder()
                .categoryId(categoryId)
                .status(StatusConstant.ENABLE)
                .build();
        return dishMapper.list(dish);
    }

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }



}
